hi!
i used to use it. at about 100%. then i turned it off to test out a bug.
for COD: NO, dont use it. the game is so much better without it.
currently using it at default
100%
100%
100%
enable center spring - no
oh, please read this
http://www.il2bugtracker.com/issues/191
so, if you start flyign and your stick is dead, jsut do a hard looping and enjoy it...
and im loving it.